US1873280A - Laminated glass - Google Patents

Description

Aug. 23, 1932. w. F. BROWN 1,873,280

LAMINATED GLASS Original Filed June 28. 1926 w/lbur F Brown Patented Aug; 1932 JUNlT ED sTfA rEs PATENT OFFICE.

WILBUR F. IBROW1\T, OF TOLEDO, OHIO, ASSIGNOR T LIBBEY-OWENS-FORD GLASS GOM- IANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO LAIVHNATED GLASS Application filed June 2a, 1926; Serial No. 118,985. Renewed December 11, 1930.

The present invention relates to laminated glass, and to the process. of producing the same.

An important object of the invention is to provide a process for producing, as anew article of manufacture, asheet of laminated glass, and contemplates the use of. glycerin in obtaining a suitable bond between the laminations. 1

Another object of the invention is to provide a process of this nature whereina'sheet or sheets of glassKmay-loe provided with a skin of material such as cellulose composition material, which'skin may be provided with afilm of glycerin'permitting the sheet of glass and skin to be effectively and per-. manently united to a sheet of nonbrittle'ma- -terial.-

Other objects and advantages of the in- .20.vention will become apparent during the course of the following'description. In the drawing wherein like numerals are employed to designate like parts throughout the same, 3

Fig. '1 illustrates diagrammatically the formation of a skin on a sheet of glass,

Fig. -2 illustrates diagrammatically" the application .of a film of glycerin on the skin, Fig. 3"shows in sectionthe laminations 1 after they have been treated and before they have been united, I

Fig. tis a diagrammatic representation of a press .used for uniting the laminations,

Fig; 5 is afragmentary sectional view of "'35 the finished prdduct and Fig.6 is a sumlar Lviewof another form of product... i The numeral 10 designates a sheet of glass, the said sheet preferably being trans parent. A skin 11 may be formedon the sheet of glass by means of a spray or the like 12.

y Y ""The skin is preferably a cellulose composition.

7 material, and as shown is applied by dissolving the material in a suitable solvent. Afterthe liquid has been sprayed on the sheet of glass 10 or otherwise applied, it is permitted to dry so that practically all solvents may be removed, leaving a relatively dry skin of material closel adhering to the sheet of glass.

In Fig. 2 a of glycerin 13 is being ap- M The film of glycerin may be applied by means of a brush 14, or it may be sprayed on.

To produce a sheet of non-brittle glass, two

sheets of glass 15and 16, shown in Fig. 3, are united to a sheet of non-brittle material 17 The non-brittle material 17, which may be any of the well known cellulose composition materials, may also be provided with a skin or skins 18 and 19, which can be coated with films of glycerin 2O and 21. After the sheets of glass'have been treated in this manner the three laminations are superimposed and placed in a press'designated by the numeral 22 and illustrated diagrammatically in Fig. 4. The laminations are here subjected to the action of heat and pressure, thepressure being applied preferably centrally thereof first so that excess glycerin will be expelled from between said laminations.

In Fig;- 5 is illustrated in section the finstood that the thickness of the films are ex- In Fig. 6 is shown a'sheet of so-called bullet ished product. It is of course to beunder aggerated, as the amount of glycerin remain ing between the laminations will be very little. .16

proof glass, comprising a central relatively thick 'sheet23, two outer sheets 24, andsheets of non-brittle material 25, whicha're united in accordance with the present invention. The sheet of non-brittle'materialneed not necessarily be a'cellulose composition material, as 'anymaterialhaving substantially the same properties may be-used. Y It i'sto be understoodfthat the form of the invention herewithshown and described is I to be taken as the preferred. embodiment of the same, and that various changes in the shape, size and arrangement of parts may be resortedto without departing from thespirit of the invention or the scope of thesubjoined been coated with a film of glycerin.

2. Asa newarticle of manufacture, a sheet of laminated glass including a sheet of glass having a skin of cellulose composition matev and State of Ohio, this rial thereon which has been treated with a film of glycerin.

3. As a new article of manufacture, a shee of laminated glass comprising a sheet of glass,- a skin thereon, a film of glycerin, and a sheet 1 of non-brittle material.

4. As a new article of manufacture, a sheet of laminated glass comprising two sheets of 7 glass and a sheet ofnon-brittle material, and

a. film of glycerin interposed between the two sheets of I glass and sheet of non brittle material.

5. As a new article of manufacture, a sheet of laminated glass comprising a plurality of laminations "bonded together by means of glycerin.

6. As a new article of manufacture, a sheet of laminated glass comprising two sheets of glass and a sheet of cellulose ester united by a bonding material including glycerin.

Signed at Toledo, in the countyof Lucas, 24th day of June, 1926. WILBUR F..BROWN.

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